POWR-SPEED ® Fuse
PSX SERIES HIGH-SPEED SQUARE BODY
Semiconductor Fuses • 1500 V Dc Class aR • 80 A–1400 A
Specifications
Voltage Rating
Description
Littelfuse PSX series 1500 V dc high-speed square body
fuses are specially designed to protect battery energy
storage systems (BESS), photovoltaic inverters, and many
dc applications such as dc common bus systems, larger
industrial regenerative drives, rectifiers and metal processing
equipment.
The PSX series fuses are extremely fast-acting, offering
high-speed performance up to 1500 V dc, ranging from
80 A to 1400 A in the smallest NH XL package sizes. The
PSX series is available with multiple mounting terminations
including flush-end, DIN, and bolted-blade styles. Visual
blown fuse indication is standard on all fuses and optional
micro-switch is available for external indication.
Dc: 1500 V
Ac: Consult factory
Amperage Rating
80 A–1400 A
Interrupting Rating
Dc: 250 kA
Time Constant
1XL: </= 3 ms
3XL: </= 5 ms
Microswitch
Yes
Mounting
Bolted-blade style, DIN-blade style,
Metric flush-end style
Material
Body: ceramic
Contacts: plated copper (bladed)
plated brass (flush end)
Approvals
UL 248-13 Recognized
cURus (File: E71611)
Environmental
RoHS Compliant, REACH
Operating Temperature
-55 °C to +125 °C
Storage Temperature
Up to +35 °C with relative humidity <65 %
Country of Origin
Mexico
Ordering Part Number
PSX 3XL UB 1400 X
Series
Case Size
Packing Quantity
1XL, 3XL
X = (1 pc/box)
Amperage
PSX series are certified to UL248-13 and designed to meet
EN high-speed semiconductor fuse and upcoming battery
protection fuse standards.
Termination
Features/Benefits
Catalog Number
High dc voltage rating up to 1500 V dc
Dc interrupting rating rated at 250 kA
Extremely fast acting (high-speed performance)
Low watt loss (energy efficiency for BESS applications)
Compact NH 1XL and 3XL sizes
Applications
Battery energy storage systems (BESSs)
Power conversion systems
Dc common bus systems
Hybrid PV-BESS inverters
Regenerative drives
Industrial heaters and welding equipment
Metal processing equipment
UB = bolted blade
DB = DIN blade
FL = flush-metric
SERIES CASE
SIZE TERMINATION AMPERAGE
PSX
3XL
UB
1400
CATALOG
NUMBER
ORDERING
PART NUMBER
PSX3XLUB1400 PSX3XLUB1400X
Recommended Accessories
Microswitch: MSXL2000C
Web Resources
Download technical documents: Littelfuse.com/psx
1 of 10
Littelfuse.com/PSX
© 2021 Littelfuse, Inc.
Rev: 092421
POWR-SPEED ® Fuse
PSX SERIES HIGH-SPEED SQUARE BODY
Electrical Characteristics
CASE
SIZE
NH 1XL
NH 3XL
CATALOG NUMBER
FLUSH
METRIC (FL)
PSX1XLFL0080
PSX1XLFL0100
PSX1XLFL0125
PSX1XLFL0160
PSX1XLFL0200
PSX1XLFL0250
PSX1XLFL0280
PSX1XLFL0315
PSX1XLFL0350
PSX1XLFL0400
PSX1XLFL0450
PSX1XLFL0500
PSX1XLFL0550
PSX1XLFL0630
PSX3XLFL0450
PSX3XLFL0500
PSX3XLFL0550
PSX3XLFL0630
PSX3XLFL0700
PSX3XLFL0800
PSX3XLFL0900
PSX3XLFL1000
PSX3XLFL1100
PSX3XLFL1250
PSX3XLFL1400
BOLTED
BLADE (UB)
PSX1XLUB0080
PSX1XLUB0100
PSX1XLUB0125
PSX1XLUB0160
PSX1XLUB0200
PSX1XLUB0250
PSX1XLUB0280
PSX1XLUB0315
PSX1XLUB0350
PSX1XLUB0400
PSX1XLUB0450
PSX1XLUB0500
PSX1XLUB0550
PSX1XLUB0630
PSX3XLUB0450
PSX3XLUB0500
PSX3XLUB0550
PSX3XLUB0630
PSX3XLUB0700
PSX3XLUB0800
PSX3XLUB0900
PSX3XLUB1000
PSX3XLUB1100
PSX3XLUB1250
PSX3XLUB1400
DIN
BLADE (DB)
PSX1XLDB0080
PSX1XLDB0100
PSX1XLDB0125
PSX1XLDB0160
PSX1XLDB0200
PSX1XLDB0250
PSX1XLDB0280
PSX1XLDB0315
PSX1XLDB0350
PSX1XLDB0400
PSX1XLDB0450
PSX1XLDB0500
PSX1XLDB0550
PSX1XLDB0630
PSX3XLDB0450
PSX3XLDB0500
PSX3XLDB0550
PSX3XLDB0630
PSX3XLDB0700
PSX3XLDB0800
PSX3XLDB0900
PSX3XLDB1000
PSX3XLDB1100
PSX3XLDB1250
PSX3XLDB1400
AMPERE
RATING
(A)
80
100
125
160
200
250
280
315
350
400
450
500
550
630
450
500
550
630
700
800
900
1000
1100
1250
1400
VOLTAGE
TOTAL CLEARING
INTERRUPTING MINIMUM
AGENCY
WATTS LOSS
RATING
I2T (A 2S) AT
MELTING
RATING
CERTIFICATION
BREAKING
AT 100%
(V)
(PRE-ARC) RATED VOLTAGE
CAPACITY
RATED
I2T (A 2S)
(A)
CURRENT (W)
DC
DC
DC
cURus
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
250 kA
800 A
1000 A
1250 A
1600 A
2000 A
2500 A
2800 A
3150 A
3500 A
4000 A
6750 A
7500 A
8250 A
9450 A
4500 A
5000 A
5500 A
6300 A
7000 A
8000 A
9000 A
10000 A
11000 A
12500 A
14000 A
2048
3540
7091
13704
18016
36552
36552
56940
86623
116271
149336
250109
276650
276650
57143
98570
142790
205617
305720
335493
403262
484792
656719
995376
1395828
8720
15485
35720
55490
77240
156450
156450
212400
332050
352600
540850
774600
924967
924967
194500
333900
451600
650304
1003650
1150000
1308500
1791500
2201250
3003500
4228250
16.4
19.1
19.6
24.6
34.6
38.5
48.7
53.6
51.8
64.4
69.3
71.5
83.1
127.3
146.3
132.5
136.7
150.9
164.5
209.6
266.9
335.0
341.0
346.9
361.9
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Ordering Information
CASE
SIZE
NH 1XL
NH 3XL
FLUSH METRIC (FL)
CATALOG
ORDERING PART
NUMBER
NUMBER
PSX1XLFL0080 PSX1XLFL0080X
PSX1XLFL0100 PSX1XLFL0100X
PSX1XLFL0125 PSX1XLFL0125X
PSX1XLFL0160 PSX1XLFL0160X
PSX1XLFL0200 PSX1XLFL0200X
PSX1XLFL0250 PSX1XLFL0250X
PSX1XLFL0280 PSX1XLFL0280X
PSX1XLFL0315 PSX1XLFL0315X
PSX1XLFL0350 PSX1XLFL0350X
PSX1XLFL0400 PSX1XLFL0400X
PSX1XLFL0450 PSX1XLFL0450X
PSX1XLFL0500 PSX1XLFL0500X
PSX1XLFL0550 PSX1XLFL0550X
PSX1XLFL0630 PSX1XLFL0630X
PSX3XLFL0450 PSX3XLFL0450X
PSX3XLFL0500 PSX3XLFL0500X
PSX3XLFL0550 PSX3XLFL0550X
PSX3XLFL0630 PSX3XLFL0630X
PSX3XLFL0700 PSX3XLFL0700X
PSX3XLFL0800 PSX3XLFL0800X
PSX3XLFL0900 PSX3XLFL0900X
PSX3XLFL1000 PSX3XLFL1000X
PSX3XLFL1100 PSX3XLFL1100X
PSX3XLFL1250 PSX3XLFL1250X
PSX3XLFL1400 PSX3XLFL1400X
UPC
07945825798
07945825799
07945825800
07945825801
07945825802
07945825803
07945825804
07945825805
07945825806
07945825807
07945825808
07945825809
07945825810
07945825811
07945828641
07945828642
07945828643
07945828644
07945825812
07945825813
07945825814
07945825815
07945825816
07945825817
07945825818
BOLTED BLADE (UB)
CATALOG
ORDERING PART
UPC
NUMBER
NUMBER
PSX1XLUB0080 PSX1XLUB0080X 07945825819
PSX1XLUB0100 PSX1XLUB0100X 07945825820
PSX1XLUB0125 PSX1XLUB0125X 07945825821
PSX1XLUB0160 PSX1XLUB0160X 07945825822
PSX1XLUB0200 PSX1XLUB0200X 07945825823
PSX1XLUB0250 PSX1XLUB0250X 07945825824
PSX1XLUB0280 PSX1XLUB0280X 07945825825
PSX1XLUB0315 PSX1XLUB0315X 07945825826
PSX1XLUB0350 PSX1XLUB0350X 07945825827
PSX1XLUB0400 PSX1XLUB0400X 07945825828
PSX1XLUB0450 PSX1XLUB0450X 07945825829
PSX1XLUB0500 PSX1XLUB0500X 07945826310
PSX1XLUB0550 PSX1XLUB0550X 07945826311
PSX1XLUB0630 PSX1XLUB0630X 07945826312
PSX3XLUB0450 PSX3XLUB0450X 07945828645
PSX3XLUB0500 PSX3XLUB0500X 07945828646
PSX3XLUB0550 PSX3XLUB0550X 07945828647
PSX3XLUB0630 PSX3XLUB0630X 07945828648
PSX3XLUB0700 PSX3XLUB0700X 07945826313
PSX3XLUB0800 PSX3XLUB0800X 07945826314
PSX3XLUB0900 PSX3XLUB0900X 07945826315
PSX3XLUB1000 PSX3XLUB1000X 07945826316
PSX3XLUB1100 PSX3XLUB1100X 07945826317
PSX3XLUB1250 PSX3XLUB1250X 07945826318
PSX3XLUB1400 PSX3XLUB1400X 07945826319
2 of 10
CATALOG
NUMBER
PSX1XLDB0080
PSX1XLDB0100
PSX1XLDB0125
PSX1XLDB0160
PSX1XLDB0200
PSX1XLDB0250
PSX1XLDB0280
PSX1XLDB0315
PSX1XLDB0350
PSX1XLDB0400
PSX1XLDB0450
PSX1XLDB0500
PSX1XLDB0550
PSX1XLDB0630
PSX3XLDB0450
PSX3XLDB0500
PSX3XLDB0550
PSX3XLDB0630
PSX3XLDB0700
PSX3XLDB0800
PSX3XLDB0900
PSX3XLDB1000
PSX3XLDB1100
PSX3XLDB1250
PSX3XLDB1400
DIN BLADE (DB)
ORDERING PART
NUMBER
PSX1XLDB0080X
PSX1XLDB0100X
PSX1XLDB0125X
PSX1XLDB0160X
PSX1XLDB0200X
PSX1XLDB0250X
PSX1XLDB0280X
PSX1XLDB0315X
PSX1XLDB0350X
PSX1XLDB0400X
PSX1XLDB0450X
PSX1XLDB0500X
PSX1XLDB0550X
PSX1XLDB0630X
PSX3XLDB0450X
PSX3XLDB0500X
PSX3XLDB0550X
PSX3XLDB0630X
PSX3XLDB0700X
PSX3XLDB0800X
PSX3XLDB0900X
PSX3XLDB1000X
PSX3XLDB1100X
PSX3XLDB1250X
PSX3XLDB1400X
UPC
BOX
QUANTITY
07945826320
07945826321
07945826322
07945826323
07945826324
07945826325
07945826326
07945826327
07945826328
07945826329
07945826330
07945826331
07945826332
07945826333
07945828649
07945828650
07945828651
07945828652
07945826334
07945826335
07945826336
07945826337
07945826338
07945826339
07945826340
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
1 pc/box
Littelfuse.com/PSX
© 2021 Littelfuse, Inc.
Rev: 092421
POWR-SPEED ® Fuse
PSX SERIES HIGH-SPEED SQUARE BODY
FIGURE 1
B
E
Dimensions
FIGUREFIGURE
1
1
B
E
B
E
FIGURE 2
FIGURE 1
FIGUREFIGURE
2
2
B
B
E
FIGURE 3
FIGURE 2
B
H
B
H
B
H
H
FIGUREFIGURE
3
3
B
B
B
E
E
E
H
C
C
C
C
E
C
E C
E
D
D
A
D
D
FA
F
A
G
D
C
E
D
J
A
G
I
F
A
J
AI
JF
I
F
A
J
A
F
I
I
F
IA
A
D
D
F
FI
A
I
G
Figure 1. Flush-metric style
F
G
G
G
G
Figure 2. Bolted-blade style
Figure 3. DIN-blade style
DIMENSIONS MM (IN)
NH
1XL
NH
3XL
D
G
G
CASE
SIZE
H
C
D
D
H
C
C
B
E
D
F
G
C
FIGURE 3
MOUNTING
STYLE
FIGURE
A
B
C
D
E
F
G*
H
I
J
RECOMMENDED
FASTENER
THREAD
RECOMMENDED
TORQUE
FLUSH
METRIC (FL)
1
128.5
(5.06)
51.5
(2.03)
51.5
(2.03)
57.5
(2.26)
20.0
(0.79)
126.7
(4.99)
83.9
(3.30)
-
-
-
-
M8 x 1.25
13–20 Nm
BOLTED
BLADE (UB)
2
211.5
(8.33)
51.5
(2.03)
51.5
(2.03)
57.5
(2.26)
25.0
(0.98)
126.7
(4.99)
83.9
(3.30)
6.0
(0.24)
146.5
(5.77)
187.5
(7.38)
12 mm
(1/2)
-
64 Nm
DIN BLADE
(DB)
3
199.5
(7.85)
51.5
(2.03)
51.5
(2.03)
57.5
(2.26)
25.0
(0.98)
126.7
(4.99)
83.9
(3.30)
6.0
(0.24)
167.5
(6.59)
-
10 mm
(3/8)
-
26 Nm
FLUSH
METRIC (FL)
1
129.5
(5.10)
73.5
(2.89)
73.5
(2.89)
79.5
(3.13)
30.0
(1.18)
128.1
(5.04)
105.9
(4.17)
-
-
-
-
M12 x 1.75
45–55 Nm
BOLTED
BLADE (UB)
2
213.5
(8.41)
73.5
(2.89)
73.5
(2.89)
79.5
(3.13)
36.0
(1.42)
128.7
(5.07)
105.9
(4.17)
6.0
(0.24)
153.1
(6.03)
186.1
(7.33)
14 mm
(9/16)
-
92 Nm
DIN BLADE
(DB)
3
199.0
(7.83)
73.5
(2.89)
73.5
(2.89)
79.5
(3.13)
36.0
(1.42)
128.7
(5.07)
105.9
(4.17)
6.0
(0.24)
166.8
(6.57)
-
10 mm
(3/8)
-
26 Nm
*These dimensions include the optional bolt-on microswitch.
3 of 10
Littelfuse.com/PSX
© 2021 Littelfuse, Inc.
Rev: 092421
G
G
POWR-SPEED ® Fuse
PSX SERIES HIGH-SPEED SQUARE BODY
Time Current Curve (1XL Case Size 80 A–400 A)
100
90
80
70
60
50
40
30
30
20
20
10
9
8
7
6
5
4
10
9
8
7
6
5
4
- 80A
3
3
- 100A
2
VIRTUAL MELTING (PRE‐ARCING) TIME IN SECONDS
100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
900
800
700
600
500
400
300
200
100
100
90
80
70
60
50
40
2
- 125A
- 160A
1
0.9
0.8
0.7
0.6
0.5
0.4
1
0.9
0.8
0.7
0.6
0.5
0.4
- 200A
- 250A
- 315A
0.3
0.3
- 350A
0.2
0.2
- 400A
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.03
0.02
0.02
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.003
0.003
0.002
0.002
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0.0003
0.0002
0.0002
0.0001
0.0001
100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
900
800
700
600
500
400
300
200
100
PROSPECTIVE R.M.S CURRENT IN AMPERE
TEST VOLTAGE:
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
PSX1XL 80A - 630A
BASIS FOR DATA:
DRAWN BY: LLL
DATE:
10/15/2020
REVISION: C
LITTELFUSE, INC.
CHICAGO, IL. USA
TIME CURRENT CHARACTERISTIC CURVES
- THIS DATA IS GENERATED IN EXCEL -
4 of 10
DRAWING NO.:
SHEET 2 OF 4
FCC01-PSX1XL
Littelfuse.com/PSX
© 2021 Littelfuse, Inc.
Rev: 092421
POWR-SPEED ® Fuse
PSX SERIES HIGH-SPEED SQUARE BODY
Time Current Curve (1XL Case Size 450 A–630 A)
VIRTUAL MELTING (PRE‐ARCING) TIME IN SECONDS
100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
900
800
700
600
500
400
300
200
100
100
90
80
70
60
50
40
100
90
80
70
60
50
40
30
30
20
20
10
9
8
7
6
5
4
10
9
8
7
6
5
4
3
3
2
2
1
0.9
0.8
0.7
0.6
0.5
0.4
1
0.9
0.8
0.7
0.6
0.5
0.4
- 450A
0.3
0.3
- 500A
0.2
0.2
- 630A
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.03
0.02
0.02
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.003
0.003
0.002
0.002
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0.0003
0.0002
0.0002
0.0001
0.0001
100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
900
800
700
600
500
400
300
200
100
PROSPECTIVE R.M.S CURRENT IN AMPERE
TEST VOLTAGE:
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
PSX1XL 80A - 630A
BASIS FOR DATA:
DRAWN BY: LLL
DATE:
10/15/2020
REVISION: C
LITTELFUSE, INC.
CHICAGO, IL. USA
TIME CURRENT CHARACTERISTIC CURVES
- THIS DATA IS GENERATED IN EXCEL -
5 of 10
DRAWING NO.:
SHEET 3 OF 4
FCC01-PSX1XL
Littelfuse.com/PSX
© 2021 Littelfuse, Inc.
Rev: 092421
POWR-SPEED ® Fuse
PSX SERIES HIGH-SPEED SQUARE BODY
Time Current Curve (1XL Case Size 280 A and 550 A)
VIRTUAL MELTING (PRE‐ARCING) TIME IN SECONDS
100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
900
800
700
600
500
400
300
200
100
100
90
80
70
60
50
40
100
90
80
70
60
50
40
30
30
20
20
10
9
8
7
6
5
4
10
9
8
7
6
5
4
3
3
2
2
1
0.9
0.8
0.7
0.6
0.5
0.4
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
- 280A
0.2
- 550A
0.3
0.2
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.03
0.02
0.02
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.003
0.003
0.002
0.002
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0.0003
0.0002
0.0002
0.0001
0.0001
100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
900
800
700
600
500
400
300
200
100
PROSPECTIVE R.M.S CURRENT IN AMPERE
TEST VOLTAGE:
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
PSX1XL 80A - 630A
BASIS FOR DATA:
DRAWN BY: LLL
DATE:
10/15/2020
REVISION: C
LITTELFUSE, INC.
CHICAGO, IL. USA
TIME CURRENT CHARACTERISTIC CURVES
- THIS DATA IS GENERATED IN EXCEL -
6 of 10
DRAWING NO.:
SHEET 4 OF 4
FCC01-PSX1XL
Littelfuse.com/PSX
© 2021 Littelfuse, Inc.
Rev: 092421
POWR-SPEED ® Fuse
PSX SERIES HIGH-SPEED SQUARE BODY
Time Current Curve (3XL Case Size 450 A–1400 A)
VIRTUAL MELTING (PRE‐ARCING) TIME IN SECONDS
1000000
900000
800000
700000
600000
500000
400000
300000
200000
100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
900
800
700
600
500
400
300
200
100
100
90
80
70
60
50
40
100
90
80
70
60
50
40
30
30
20
20
10
9
8
7
6
5
4
10
9
8
7
6
5
4
3
3
2
2
1
0.9
0.8
0.7
0.6
0.5
0.4
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.3
0.2
0.2
- 450A
- 500A
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.1
0.09
0.08
0.07
0.06
0.05
0.04
- 550A
- 630A
- 700A
0.03
0.03
- 800A
0.02
0.02
- 900A
- 1000A
0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.01
0.009
0.008
0.007
0.006
0.005
0.004
- 1100A
- 1250A
- 1400A
0.003
0.003
0.002
0.002
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.001
0.0009
0.0008
0.0007
0.0006
0.0005
0.0004
0.0003
0.0003
0.0002
0.0002
0.0001
0.0001
1000000
900000
800000
700000
600000
500000
400000
300000
200000
100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
900
800
700
600
500
400
300
200
100
PROSPECTIVE R.M.S CURRENT IN AMPERE
TEST VOLTAGE:
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
PSX3XL 450A - 1400A
BASIS FOR DATA:
DRAWN BY: LLL
03/09/2020
DATE:
REVISION: D
LITTELFUSE, INC.
CHICAGO, IL. USA
TIME CURRENT CHARACTERISTIC CURVES
7 of 10
- THIS DATA IS GENERATED IN EXCEL -
DRAWING NO.:
Littelfuse.com/PSX
© 2021 Littelfuse, Inc.
Rev: 092421
SHEET 2 OF 2
FCC01-PSX3XL
POWR-SPEED ® Fuse
PSX SERIES HIGH-SPEED SQUARE BODY
Total Clearing l2T Correction Factor Curve (1XL and 3XL)
1500
1400
1300
1200
1100
1000
900
800
700
600
500
1
TOTAL CLEARING I2t CORRECTION FACTOR
1
0.9
0.9
0.8
0.8
0.7
0.7
0.6
0.6
0.5
0.5
0.4
0.4
0.3
0.3
0.2
0.2
0.1
0.1
1500
1400
1300
1200
1100
1000
900
800
700
600
500
OPERATING VOLTAGE IN VOLTS
TEST VOLTAGE: 500V - 1500V
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
PSX series
BASIS FOR DATA:
DRAWN BY: LLL
03/31/2020
DATE:
REVISION: A
LITTELFUSE, INC.
CHICAGO, IL. USA
DRAWING NO.:
I2T VARIATION CURVES
- THIS DATA IS GENERATED IN EXCEL -
8 of 10
SHEET 2 OF 2
FCC07-PSX
Littelfuse.com/PSX
© 2021 Littelfuse, Inc.
Rev: 092421
POWR-SPEED ® Fuse
PSX SERIES HIGH-SPEED SQUARE BODY
Peak Arc Voltage Curve 1XL and 3XL
2000
1900
PEAK ARC VOLTAGE IN VOLT
1800
1700
1600
1500
1400
1300
1200
500
600
700
800
900
1000
1100
1200
1300
1400
1500
OPERATING VOLTAGE IN VOLTS
TEST VOLTAGE: 500V-1500V
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
L70S
PSX35-800A
series
BASIS FOR DATA:
LLL
DRAWN BY: LLL
01/26/2015
03/31/2020
DATE:
A
LITTELFUSE, INC.
CHICAGO, IL. USA
REVISION: A
MAX ARC VOLTAGE
ARC VOLTAGE
VARIATION CURVE
- THIS DATA IS GENERATED IN EXCEL -
9 of 10
DRAWING NO.:
SHEET 2
3 OF 2
3
FCC09-PSX
FCC0Littelfuse.com/PSX
© 2021 Littelfuse, Inc.
Rev: 092421
POWR-SPEED ® Fuse
PSX SERIES HIGH-SPEED SQUARE BODY
Watts Loss Correction Factor Curve
Temperature Derating Curve
100
90
80
70
60
50
30%
40
30
1
1
20%
0.9
0.9
0.8
0.8
0.7
0.7
0.6
0.6
0.5
0.5
0.4
0.4
0.3
0.3
0.2
0.2
0.1
0.1
10%
0
0
10%
30%
40%
50%
-60°C
-76°F
-40°C
-40°F
-20°C
-4°F
0°C
32°F
20°C
68°F
40°C
104°F
60°C
140°F
80°C
176°F
100°C
212°F
120°C
248°F
PERCENT OF DOWNRATING
20%
WATTS LOSS CORRECTION FACTOR
PERCENT OF UPRATING
(temperature of air immediately surrounding fuse)
140°C
284°F
100
90
80
70
60
50
40
30
AMBIENT TEMPERATURE
PERCENT OF RATED CURRENT(%)
TEST VOLTAGE:
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
TEST VOLTAGE:
PSR Series
BASIS FOR DATA:
LITTELFUSE, INC.
CHICAGO, IL. USA
TEMPERATURE RE-RATING CURVE
DRAWN BY: LLL
04/04/2017
DATE:
A
REVISION:
DRAWING NO.:
FCC11-PSR
TIME CONSTANT/POWER FACTOR:
FUSE CATALOG NUMBER:
PSR35-800A
Series
L50S
BASIS FOR DATA:
LITTELFUSE, INC.
CHICAGO, IL. USA
DRAWN BY: LLL
01/26/2015
03/20/2017
DATE:
A
REVISION:
DERATINGI2T
CURVE
CORRECTION
- WATTS LOSS
FACTOR
CORRECTION
SHEET 2 OF 2
DRAWING NO.:
FCC08-PSR
FCC0-
SHEET 2
3 OF 2
3
- THIS DATA IS GENERATED IN EXCEL -
- THIS DATA IS GENERATED IN EXCEL -
Disclaimer Notice – Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse
products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/product-disclaimer.
10 of 10
Littelfuse.com/PSX
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Rev: 092421